Nmisc: Miscellaneous Functions Used at 'Numeract LLC'

Contains functions useful for debugging, set operations on vectors,
and 'UTC' date and time functionality. It adds a few vector manipulation
verbs to 'purrr' and 'dplyr' packages. It can also generate an R file to
install and update packages to simplify deployment into production. The
functions were developed at the data science firm 'Numeract LLC' and are
used in several packages and projects.